|Quadrangle map, 1:250,000-scale||MM|
|Quadrangle map, 1:63,360-scale||C-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 4100 feet on an unnamed ridge between upper Myrtle Creek and upper Caribou Creek. It is about 1.4 miles north of Spruce Peak, in the NE1/4 SW1/4 section 21, T. 15 S., R. 16 W., Fairbanks Meridian. The location is accurate within 500 feet. The occurrence corresponds to number 59 of Bundtzen, Smith, and Tosdal (1976), 277 of Hawley and Associates (1978), and 66b of Bundtzen (1981).|
Geologic descriptionThis occurrence is a stratabound gossan developed on pyritic metafelsite of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981). The metafelsite forms stratiform lenses in graphitic and chloritic schist. The gossan can be traced southwesterly for about 1500 feet. As much as 50 percent pyrite occurs in half-inch-thick bands in the metafelsite; much of this material is oxidized to limonite. Samples contain less than 1 ppm each of gold and silver, and small amounts of copper, lead, and zinc (Thornsberry, McKee, and Salisbury, 1984, v. 2).
|Geologic map unit||(-150.668385237996, 63.5970006442742)|
|Mineral deposit model||Stratabound deposit in metafelsite.|
|Age of mineralization||Probably early Paleozoic, the protolith age of the Spruce Creek sequence.|
|Alteration of deposit||Iron-oxide alteration.|
|Workings or exploration||Reconnaissance mapping and sampling. There are no workings.|
|Indication of production||None|
Additional commentsThe occurrence is in Denali National Park and Preserve.
Bundtzen, T.K., 1981, Geology and mineral deposits of the Kantishna Hills, Mt. McKinley quadrangle, Alaska: M. S. Thesis, University of Alaska, College, Alaska, 238 p.
Bundtzen, T.K., Smith, T.E., and Tosdal, R.M., 1976, Progress report--Geology and mineral deposits of the Kantishna Hills: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-98, 80 p., 2 sheets, scale 1:63,360.
Hawley, C. C. and Associates, Inc, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U. S. Bureau of Mines Open-File Report 24-78, 275 p. (paged by sections).
Thornsberry, V. V., McKee, C. J., and Salisbury, W. G., eds, 1984, 1983 Mineral Resource Studies: Kantishna Hills and Dunkle Mine Areas, Denali National Park and Preserve, Alaska: U. S. Bureau of Mines Open-File Report 129-84. 3 Volumes: v. 1, Text; v. 2, Appendices; v. 3, Maps. Prepared by Salisbury & Dietz, Inc., Spokane, WA.
|Last report date||5/4/2001|